Improvement in let-off mechanism for looms



'tnted States JOHN DAY, OF PATERSON, NEW JERSEY.

vLetters Patent No. 102,506, dated May 3, 1870.

IMPROVEMENT IN LET-OFF MECHANISM FOR LOOMS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it'knownthat I, JOHN DAY, ot Paterson, inthe county of Passaic and State of N ew Jersey, have invented a new andimproved Compensating Let-oft' for Looms; and I do hereby declare thatthe following is a t'ull, clear, and exact description thereof', whichwill enable others skilled in the art to makeand use thesamc,1'et'erence being had to the accompanying drawings' forming part ofthis specification. ,f'

`This invention relates to in'iprovements in letif motions t'or looms,and consists in th applicatim, in addition to the ordinary warp-roll, ofan auxiliary roll,-mountcd-on a vertically-sliding and weighted frame,under which the warpis carried from the warp'- roll, and to anotherguiding-roll, which, together with then'arp-rolh'areelevated in a`vertical extension ot the loom-frame, so that the weight ofthe auxiliaryroll, frame, and weights is suspended in the hight of'.

the warp, which passes over another guide-roll in the plane ot' theiirst, and down under a third guide-roll, and thence through the sley tothe work-beam. Previous to passing under the tina-l guide-roll, the warppasses through a sley or reed, for guiding it evenly ou the said roll.

llhis improved attachment is designed to provide a better means forproducing uniform tension in the warp, and relieving the shocks thereondue to the beating up of the lay, which vary materially withtheatmospheric changes, especially silk and cotton warp,

` the working otf which this apparatus is especially designed for. l

Figure l represents a longitudinal sectional elevation of my rimprovedlet-oft" attachment, and

Figure 2iis a rear elevation of the same.

lSimilar letters ot' reference indicate corresponding parts. f

A is avertical and rearextension ot the loom-trame, at the rear uppercorner ot' which the warp-roll B' is mounted. 1t is provided with anypreferred arrangement of friction devices. In this instance I haverepresented a friction-cord, C, wound once or more around' the groovedpulley, and connectedto the spring D.

E is the auxiliary roll, mounted in a sliding and weighted frame, F,below the roll B, working in the vertical guiding-grooves, G, in therear posts ofthe extension frame.

H and I are guide-rolls, mounted on the top of the frame, and

K is another guide-roll, mounted in the front posts oi' the extensiont'ramc A, in lthe horzontalplane ot the work-beam.

The warp is carried t'rom the roll B, under E, over H and I, and underK, and thence through the harness and sley to the work-beam andcloth-roll, in the usual way.

By this arrangement, the warp is placed under tension throughout a muchgreater 'dista-nce after leaving the warp-roll, and 'bet'ore winding onthe cloth-roll, whereby it will stretch more under the sudden strainsot' the reed in heating up, and, being carried under the auxiliary roll,.which is capable o t' rising and falling as the tension increases ordiminishes, the variations in the strain on the warp, due to beatingup,or to atmospheric or other causes, will be compensated for in aneljcient and reliable manner, so that the tension on the \rarptln eadswill lbe equalizctl morenearly than is the case with the presentarrangements, no matter how wide the warp may be.

rjhis vertical extension of the frame and elevation ofthe guide-rollersover which the warp is carried at'- ford convenient access to the warp,for the attendant to clean the same, as it is working through the loom.

Having thus described my invention,

I claim as new and desire to secure by Letters 'lhe combination, withthe warp-roll ot a loom, of the auxiliary roll, mounted in avertically-sliding weighted frame, and guide-rolls H, I, andv K, whenthe said warp-roll and guide-rolls H I are ar anged, as shown, in avertical extensioirof the 100m-frame, substantially as specilied.

. JOHN DAY.

Witnesses:

GEO. W. MABBE, E. TATE.

